[rules-users] Out of Memory Issue of JBoss Engine deployed on IBM WAS 6.0.2.7

[Dejia Wang]

Hi All, 

 

I ran into OOM (Out of Memory) issue of JBoss Engine deployed on IBM WAS
6.0.2.7. Below is the log

 

...

[Loaded org.antlr.runtime.DFA from
file:/D:/WebSphere/AppServer/profiles/AppSrv01/installedApps/xxxNode02Ce
ll/xxx.ear/lib/antlr-3.0ea8.jar]

[Loading superclass and interfaces of org/antlr/runtime/DFA]

[Preparing org/antlr/runtime/DFA]

[Loaded org.antlr.runtime.DFA$State from
file:/D:/WebSphere/AppServer/profiles/AppSrv01/installedApps/xxxNode02Ce
ll/xxxApplications.ear/lib/antlr-3.0ea8.jar]

[Loading superclass and interfaces of org/antlr/runtime/DFA$State]

[Loaded org.drools.lang.RuleParserLexer$1 from
file:/D:/WebSphere/AppServer/profiles/AppSrv01/installedApps/xxxNode02Ce
ll/xxxApplications.ear/lib/drools-compiler-3.0.jar]

[Loading superclass and interfaces of org/drools/lang/RuleParserLexer$1]

[Loaded org.drools.lang.RuleParserLexer$2 from
file:/D:/WebSphere/AppServer/profiles/AppSrv01/installedApps/xxxNode02Ce
ll/ xxxApplications.ear/lib/drools-compiler-3.0.jar]

[Loading superclass and interfaces of org/drools/lang/RuleParserLexer$2]

[Loaded org.drools.lang.RuleParserLexer$3 from
file:/D:/WebSphere/AppServer/profiles/AppSrv01/installedApps/xxxNode02Ce
ll/ xxxApplications.ear/lib/drools-compiler-3.0.jar]

[Loading superclass and interfaces of org/drools/lang/RuleParserLexer$3]

[Loaded org.drools.lang.RuleParserLexer$4 from
file:/D:/WebSphere/AppServer/profiles/AppSrv01/installedApps/xxxNode02Ce
ll/ xxxApplications.ear/lib/drools-compiler-3.0.jar]

[Loading superclass and interfaces of org/drools/lang/RuleParserLexer$4]

....

[Loaded org.drools.lang.RuleParserLexer$228 from
file:/D:/WebSphere/AppServer/profiles/AppSrv01/installedApps/xxxNode02Ce
ll/xxxApplications.ear/lib/drools-compiler-3.0.jar]

[Loading superclass and interfaces of
org/drools/lang/RuleParserLexer$228]

...

 

It looks like it loaded the same class hundreds of times until it
exhausts the memory.

 

Any idea why this happens and how to fix this?

 

Thanks- Dejia

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